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Accuracy of the hypospadias diagnoses and surgical treatment registrations in the Danish National Patient Register.

Clinical epidemiology

Arendt LH, Ernst A, Lindhard MS, Jønsson AA, Henriksen TB, Olsen J, Thorup J, Olsen LH, Ramlau-Hansen CH.
PMID: 29042817
Clin Epidemiol. 2017 Oct 03;9:483-489. doi: 10.2147/CLEP.S143118. eCollection 2017.

PURPOSE: The Danish National Health registers provide a valuable data source that offers unique opportunities for observational research, including studies on the congenital anomaly hypospadias. The accuracy of the diagnosis and surgical treatment registration of hypospadias in the Danish...

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Arendt LH, Ernst A, Lindhard MS, et al. Accuracy of the hypospadias diagnoses and surgical treatment registrations in the Danish National Patient Register. Clin Epidemiol. 2017;9:483-489doi: 10.2147/CLEP.S143118.
Arendt, L. H., Ernst, A., Lindhard, M. S., Jønsson, A. A., Henriksen, T. B., Olsen, J., Thorup, J., Olsen, L. H., & Ramlau-Hansen, C. H. (2017). Accuracy of the hypospadias diagnoses and surgical treatment registrations in the Danish National Patient Register. Clinical epidemiology, 9483-489. https://doi.org/10.2147/CLEP.S143118
Arendt, Linn Håkonsen, et al. "Accuracy of the hypospadias diagnoses and surgical treatment registrations in the Danish National Patient Register." Clinical epidemiology vol. 9 (2017): 483-489. doi: https://doi.org/10.2147/CLEP.S143118
Arendt LH, Ernst A, Lindhard MS, Jønsson AA, Henriksen TB, Olsen J, Thorup J, Olsen LH, Ramlau-Hansen CH. Accuracy of the hypospadias diagnoses and surgical treatment registrations in the Danish National Patient Register. Clin Epidemiol. 2017 Oct 03;9:483-489. doi: 10.2147/CLEP.S143118. eCollection 2017. PMID: 29042817; PMCID: PMC5633316.
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Lifestyle in pregnancy and cryptorchidism in sons: a study within two large Danish birth cohorts.

Clinical epidemiology

Kjersgaard C, Arendt LH, Ernst A, Lindhard MS, Olsen J, Henriksen TB, Strandberg-Larsen K, Ramlau-Hansen CH.
PMID: 29593434
Clin Epidemiol. 2018 Mar 19;10:311-322. doi: 10.2147/CLEP.S150657. eCollection 2018.

PURPOSE: Cryptorchidism is the most frequent congenital malformation in boys and is associated with low sperm count, infertility and testicular cancer. Unhealthy maternal lifestyle during pregnancy such as smoking, high prepregnancy body mass index (BMI) as well as alcohol...

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Kjersgaard C, Arendt LH, Ernst A, et al. Lifestyle in pregnancy and cryptorchidism in sons: a study within two large Danish birth cohorts. Clin Epidemiol. 2018;10:311-322doi: 10.2147/CLEP.S150657.
Kjersgaard, C., Arendt, L. H., Ernst, A., Lindhard, M. S., Olsen, J., Henriksen, T. B., Strandberg-Larsen, K., & Ramlau-Hansen, C. H. (2018). Lifestyle in pregnancy and cryptorchidism in sons: a study within two large Danish birth cohorts. Clinical epidemiology, 10311-322. https://doi.org/10.2147/CLEP.S150657
Kjersgaard, Camilla, et al. "Lifestyle in pregnancy and cryptorchidism in sons: a study within two large Danish birth cohorts." Clinical epidemiology vol. 10 (2018): 311-322. doi: https://doi.org/10.2147/CLEP.S150657
Kjersgaard C, Arendt LH, Ernst A, Lindhard MS, Olsen J, Henriksen TB, Strandberg-Larsen K, Ramlau-Hansen CH. Lifestyle in pregnancy and cryptorchidism in sons: a study within two large Danish birth cohorts. Clin Epidemiol. 2018 Mar 19;10:311-322. doi: 10.2147/CLEP.S150657. eCollection 2018. PMID: 29593434; PMCID: PMC5865585.
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Unrecognised coeliac disease among men and women undergoing fertility treatment: A screening study.

United European gastroenterology journal

Grode LB, Agerholm IE, Humaidan P, Parkner T, Bech BH, Ramlau-Hansen CH, Jensen TM.
PMID: 30574318
United European Gastroenterol J. 2018 Dec;6(10):1477-1484. doi: 10.1177/2050640618796750. Epub 2018 Aug 24.

BACKGROUND: Coeliac disease is an autoimmune disease triggered by dietary gluten and has been associated with several conditions influencing female and male reproduction. Due to unspecific symptoms, coeliac disease can be unrecognised for years.OBJECTIVE: To estimate the prevalence of...

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Grode LB, Agerholm IE, Humaidan P, et al. Unrecognised coeliac disease among men and women undergoing fertility treatment: A screening study. United European Gastroenterol J. 2018;6(10):1477-1484doi: 10.1177/2050640618796750.
Grode, L. B., Agerholm, I. E., Humaidan, P., Parkner, T., Bech, B. H., Ramlau-Hansen, C. H., & Jensen, T. M. (2018). Unrecognised coeliac disease among men and women undergoing fertility treatment: A screening study. United European gastroenterology journal, 6(10), 1477-1484. https://doi.org/10.1177/2050640618796750
Grode, Louise B, et al. "Unrecognised coeliac disease among men and women undergoing fertility treatment: A screening study." United European gastroenterology journal vol. 6,10 (2018): 1477-1484. doi: https://doi.org/10.1177/2050640618796750
Grode LB, Agerholm IE, Humaidan P, Parkner T, Bech BH, Ramlau-Hansen CH, Jensen TM. Unrecognised coeliac disease among men and women undergoing fertility treatment: A screening study. United European Gastroenterol J. 2018 Dec;6(10):1477-1484. doi: 10.1177/2050640618796750. Epub 2018 Aug 24. PMID: 30574318; PMCID: PMC6297920.
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Erratum to: Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses.

International journal of epidemiology

Brix N, Ernst A, Lauridsen LLB, Parner ET, Arah OA, Olsen J, Henriksen TB, Ramlau-Hansen CH.
PMID: 34244765
Int J Epidemiol. 2021 Jul 09;50(3):1047. doi: 10.1093/ije/dyab075.

No abstract available.

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Brix N, Ernst A, Lauridsen LLB, et al. Erratum to: Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses. Int J Epidemiol. 2021;50(3):1047doi: 10.1093/ije/dyab075.
Brix, N., Ernst, A., Lauridsen, L. L. B., Parner, E. T., Arah, O. A., Olsen, J., Henriksen, T. B., & Ramlau-Hansen, C. H. (2021). Erratum to: Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses. International journal of epidemiology, 50(3), 1047. https://doi.org/10.1093/ije/dyab075
Brix, Nis, et al. "Erratum to: Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses." International journal of epidemiology vol. 50,3 (2021): 1047. doi: https://doi.org/10.1093/ije/dyab075
Brix N, Ernst A, Lauridsen LLB, Parner ET, Arah OA, Olsen J, Henriksen TB, Ramlau-Hansen CH. Erratum to: Childhood overweight and obesity and timing of puberty in boys and girls: cohort and sibling-matched analyses. Int J Epidemiol. 2021 Jul 09;50(3):1047. doi: 10.1093/ije/dyab075. PMID: 34244765; PMCID: PMC8271182.
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Prenatal nitrosatable prescription drug intake, drinking water nitrate, and the risk of stillbirth: a register- and population-based cohort of Danish pregnancies, 1997-2017.

Environmental health : a global access science source

Thomsen AML, Ramlau-Hansen CH, Schullehner J, Ebdrup NH, Liew Z, Coffman V, Stayner L, Hansen B, Olsen J.
PMID: 34781958
Environ Health. 2021 Nov 16;20(1):118. doi: 10.1186/s12940-021-00805-z.

BACKGROUND: Nitrosatable drugs commonly prescribed during pregnancy can react with nitrite to form N-nitroso compounds which have been associated with an increased risk of stillbirth. Whether maternal residential drinking water nitrate modifies this association is unknown. We investigated, if...

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Thomsen AML, Ramlau-Hansen CH, Schullehner J, et al. Prenatal nitrosatable prescription drug intake, drinking water nitrate, and the risk of stillbirth: a register- and population-based cohort of Danish pregnancies, 1997-2017. Environ Health. 2021;20(1):118doi: 10.1186/s12940-021-00805-z.
Thomsen, A. M. L., Ramlau-Hansen, C. H., Schullehner, J., Ebdrup, N. H., Liew, Z., Coffman, V., Stayner, L., Hansen, B., & Olsen, J. (2021). Prenatal nitrosatable prescription drug intake, drinking water nitrate, and the risk of stillbirth: a register- and population-based cohort of Danish pregnancies, 1997-2017. Environmental health : a global access science source, 20(1), 118. https://doi.org/10.1186/s12940-021-00805-z
Thomsen, Anne Marie Ladehoff, et al. "Prenatal nitrosatable prescription drug intake, drinking water nitrate, and the risk of stillbirth: a register- and population-based cohort of Danish pregnancies, 1997-2017." Environmental health : a global access science source vol. 20,1 (2021): 118. doi: https://doi.org/10.1186/s12940-021-00805-z
Thomsen AML, Ramlau-Hansen CH, Schullehner J, Ebdrup NH, Liew Z, Coffman V, Stayner L, Hansen B, Olsen J. Prenatal nitrosatable prescription drug intake, drinking water nitrate, and the risk of stillbirth: a register- and population-based cohort of Danish pregnancies, 1997-2017. Environ Health. 2021 Nov 16;20(1):118. doi: 10.1186/s12940-021-00805-z. PMID: 34781958; PMCID: PMC8594235.
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The Confounder-Mediator Dilemma: Should We Control for Obesity to Estimate the Effect of Perfluoroalkyl Substances on Health Outcomes?.

Toxics

Inoue K, Goto A, Sugiyama T, Ramlau-Hansen CH, Liew Z.
PMID: 33419269
Toxics. 2020 Dec 20;8(4). doi: 10.3390/toxics8040125.

Confounding adjustment is important for observational studies to derive valid effect estimates for inference. Despite the theoretical advancement of confounding selection procedure, it is often challenging to distinguish between confounders and mediators due to the lack of information about...

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Inoue K, Goto A, Sugiyama T, et al. The Confounder-Mediator Dilemma: Should We Control for Obesity to Estimate the Effect of Perfluoroalkyl Substances on Health Outcomes?. Toxics. 2020;8(4)doi: 10.3390/toxics8040125.
Inoue, K., Goto, A., Sugiyama, T., Ramlau-Hansen, C. H., & Liew, Z. (2020). The Confounder-Mediator Dilemma: Should We Control for Obesity to Estimate the Effect of Perfluoroalkyl Substances on Health Outcomes?. Toxics, 8(4), . https://doi.org/10.3390/toxics8040125
Inoue, Kosuke, et al. "The Confounder-Mediator Dilemma: Should We Control for Obesity to Estimate the Effect of Perfluoroalkyl Substances on Health Outcomes?." Toxics vol. 8,4 (2020). doi: https://doi.org/10.3390/toxics8040125
Inoue K, Goto A, Sugiyama T, Ramlau-Hansen CH, Liew Z. The Confounder-Mediator Dilemma: Should We Control for Obesity to Estimate the Effect of Perfluoroalkyl Substances on Health Outcomes?. Toxics. 2020 Dec 20;8(4). doi: 10.3390/toxics8040125. PMID: 33419269; PMCID: PMC7766757.
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Size at birth, infant growth, and age at pubertal development in boys and girls.

Clinical epidemiology

Hvidt JJ, Brix N, Ernst A, Lauridsen LLB, Ramlau-Hansen CH.
PMID: 31572017
Clin Epidemiol. 2019 Sep 19;11:873-883. doi: 10.2147/CLEP.S217388. eCollection 2019.

PURPOSE: This study investigated whether size at birth and infant growth were associated with age of indicators of pubertal development in boys and girls. We hypothesized that restricted fetal growth and accelerated infant growth lead to earlier pubertal age.PATIENTS...

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Hvidt JJ, Brix N, Ernst A, et al. Size at birth, infant growth, and age at pubertal development in boys and girls. Clin Epidemiol. 2019;11:873-883doi: 10.2147/CLEP.S217388.
Hvidt, J. J., Brix, N., Ernst, A., Lauridsen, L. L. B., & Ramlau-Hansen, C. H. (2019). Size at birth, infant growth, and age at pubertal development in boys and girls. Clinical epidemiology, 11873-883. https://doi.org/10.2147/CLEP.S217388
Hvidt, Julie Jessen, et al. "Size at birth, infant growth, and age at pubertal development in boys and girls." Clinical epidemiology vol. 11 (2019): 873-883. doi: https://doi.org/10.2147/CLEP.S217388
Hvidt JJ, Brix N, Ernst A, Lauridsen LLB, Ramlau-Hansen CH. Size at birth, infant growth, and age at pubertal development in boys and girls. Clin Epidemiol. 2019 Sep 19;11:873-883. doi: 10.2147/CLEP.S217388. eCollection 2019. PMID: 31572017; PMCID: PMC6756829.
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Working life, health and well-being of parents: a joint effort to uncover hidden treasures in European birth cohorts.

Scandinavian journal of work, environment & health

Ubalde-Lopez M, Garani-Papadatos T, Scelo G, Casas M, Lissåker C, Peters S, Nohr EA, Albin M, Lucas R, Papantoniou K, Polańska K, Ramlau-Hansen CH, Šarac J, Selander J, Skröder H, Vasileiou E, Kogevinas M, Bültmann U, Mehlum IS, Maule M.
PMID: 34432068
Scand J Work Environ Health. 2021 Oct 01;47(7):550-560. doi: 10.5271/sjweh.3980. Epub 2021 Aug 25.

OBJECTIVE: Birth cohorts collect valuable and under-utilized information on employment and health of parents before and during pregnancy, at birth, and sometimes after birth. In this discussion paper, we examine how these data could be exploited to study the...

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Ubalde-Lopez M, Garani-Papadatos T, Scelo G, et al. Working life, health and well-being of parents: a joint effort to uncover hidden treasures in European birth cohorts. Scand J Work Environ Health. 2021;47(7):550-560doi: 10.5271/sjweh.3980.
Ubalde-Lopez, M., Garani-Papadatos, T., Scelo, G., Casas, M., Lissåker, C., Peters, S., Nohr, E. A., Albin, M., Lucas, R., Papantoniou, K., Polańska, K., Ramlau-Hansen, C. H., Šarac, J., Selander, J., Skröder, H., Vasileiou, E., Kogevinas, M., Bültmann, U., Mehlum, I. S., & Maule, M. (2021). Working life, health and well-being of parents: a joint effort to uncover hidden treasures in European birth cohorts. Scandinavian journal of work, environment & health, 47(7), 550-560. https://doi.org/10.5271/sjweh.3980
Ubalde-Lopez, Monica, et al. "Working life, health and well-being of parents: a joint effort to uncover hidden treasures in European birth cohorts." Scandinavian journal of work, environment & health vol. 47,7 (2021): 550-560. doi: https://doi.org/10.5271/sjweh.3980
Ubalde-Lopez M, Garani-Papadatos T, Scelo G, Casas M, Lissåker C, Peters S, Nohr EA, Albin M, Lucas R, Papantoniou K, Polańska K, Ramlau-Hansen CH, Šarac J, Selander J, Skröder H, Vasileiou E, Kogevinas M, Bültmann U, Mehlum IS, Maule M. Working life, health and well-being of parents: a joint effort to uncover hidden treasures in European birth cohorts. Scand J Work Environ Health. 2021 Oct 01;47(7):550-560. doi: 10.5271/sjweh.3980. Epub 2021 Aug 25. PMID: 34432068.
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Having children with multiple partners is associated with reduced risk of malignant melanoma: an observation seeking a plausible explanation.

Clinical epidemiology

Olesen AV, Parner ET, Mortensen PB, Ramlau-Hansen CH, Olsen J.
PMID: 21042556
Clin Epidemiol. 2010 Oct 21;2:229-33. doi: 10.2147/CLEP.S12468.

OBJECTIVE: We examined the association between the number of partners that mothers and fathers have children with and occurrence of cutaneous malignant melanoma (CMM).METHODS: We conducted a complete registry-based follow-up of all Danish mothers born after 1935 from the...

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Olesen AV, Parner ET, Mortensen PB, et al. Having children with multiple partners is associated with reduced risk of malignant melanoma: an observation seeking a plausible explanation. Clin Epidemiol. 2010;2:229-33doi: 10.2147/CLEP.S12468.
Olesen, A. V., Parner, E. T., Mortensen, P. B., Ramlau-Hansen, C. H., & Olsen, J. (2010). Having children with multiple partners is associated with reduced risk of malignant melanoma: an observation seeking a plausible explanation. Clinical epidemiology, 2229-33. https://doi.org/10.2147/CLEP.S12468
Olesen, Anne V, et al. "Having children with multiple partners is associated with reduced risk of malignant melanoma: an observation seeking a plausible explanation." Clinical epidemiology vol. 2 (2010): 229-33. doi: https://doi.org/10.2147/CLEP.S12468
Olesen AV, Parner ET, Mortensen PB, Ramlau-Hansen CH, Olsen J. Having children with multiple partners is associated with reduced risk of malignant melanoma: an observation seeking a plausible explanation. Clin Epidemiol. 2010 Oct 21;2:229-33. doi: 10.2147/CLEP.S12468. PMID: 21042556; PMCID: PMC2964078.
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Caesarean delivery and pubertal timing in boys and girls: A Danish population-based cohort study.

Paediatric and perinatal epidemiology

Huang K, Gaml-Sørensen A, Lunddorf LLH, Ernst A, Brix N, Olsen J, Ramlau-Hansen CH.
PMID: 34825716
Paediatr Perinat Epidemiol. 2022 Jan;36(1):104-112. doi: 10.1111/ppe.12827. Epub 2021 Nov 26.

BACKGROUND: There is considerable public and scientific interest in the declining age of pubertal timing. Prenatal and postnatal stress has been proposed to relate with earlier pubertal timing, but it remains unknown whether intrapartum stress may affect pubertal timing...

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Huang K, Gaml-Sørensen A, Lunddorf LLH, et al. Caesarean delivery and pubertal timing in boys and girls: A Danish population-based cohort study. Paediatr Perinat Epidemiol. 2021;36(1):104-112doi: 10.1111/ppe.12827.
Huang, K., Gaml-Sørensen, A., Lunddorf, L. L. H., Ernst, A., Brix, N., Olsen, J., & Ramlau-Hansen, C. H. (2022). Caesarean delivery and pubertal timing in boys and girls: A Danish population-based cohort study. Paediatric and perinatal epidemiology, 36(1), 104-112. https://doi.org/10.1111/ppe.12827
Huang, Kun, et al. "Caesarean delivery and pubertal timing in boys and girls: A Danish population-based cohort study." Paediatric and perinatal epidemiology vol. 36,1 (2022): 104-112. doi: https://doi.org/10.1111/ppe.12827
Huang K, Gaml-Sørensen A, Lunddorf LLH, Ernst A, Brix N, Olsen J, Ramlau-Hansen CH. Caesarean delivery and pubertal timing in boys and girls: A Danish population-based cohort study. Paediatr Perinat Epidemiol. 2022 Jan;36(1):104-112. doi: 10.1111/ppe.12827. Epub 2021 Nov 26. PMID: 34825716.
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The influence of parental age on timing of puberty: A study in the Danish National Birth Cohort.

Scandinavian journal of public health

Thomsen AML, Ramlau-Hansen CH, Olsen J, Brix N, Andersen AN, Lunddorf LLH, Ernst A.
PMID: 34058902
Scand J Public Health. 2021 May 31;14034948211019794. doi: 10.1177/14034948211019794. Epub 2021 May 31.

No abstract available.

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Thomsen AML, Ramlau-Hansen CH, Olsen J, et al. The influence of parental age on timing of puberty: A study in the Danish National Birth Cohort. Scand J Public Health. 2021;14034948211019794doi: 10.1177/14034948211019794.
Thomsen, A. M. L., Ramlau-Hansen, C. H., Olsen, J., Brix, N., Andersen, A. N., Lunddorf, L. L. H., & Ernst, A. (2021). The influence of parental age on timing of puberty: A study in the Danish National Birth Cohort. Scandinavian journal of public health, 14034948211019794. https://doi.org/10.1177/14034948211019794
Thomsen, Anne Marie Ladehoff, et al. "The influence of parental age on timing of puberty: A study in the Danish National Birth Cohort." Scandinavian journal of public health vol. (2021): 14034948211019794. doi: https://doi.org/10.1177/14034948211019794
Thomsen AML, Ramlau-Hansen CH, Olsen J, Brix N, Andersen AN, Lunddorf LLH, Ernst A. The influence of parental age on timing of puberty: A study in the Danish National Birth Cohort. Scand J Public Health. 2021 May 31;14034948211019794. doi: 10.1177/14034948211019794. Epub 2021 May 31. PMID: 34058902.
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Use of paracetamol (acetaminophen) as a nonprescription analgesic and semen quality in young men: A cross-sectional study.

Andrology

Østergaard CS, Ernst A, Gaml-Sørensen A, Brix N, Toft G, Haervig KK, Hougaard KS, Bonde JP, Tøttenborg SS, Ramlau-Hansen CH.
PMID: 34779581
Andrology. 2021 Nov 15; doi: 10.1111/andr.13129. Epub 2021 Nov 15.

BACKGROUND: Paracetamol (acetaminophen) is a frequently used nonprescription analgesic with suggested endocrine-disrupting properties. Epidemiological evidence on the effect of paracetamol on male fecundity is sparse.OBJECTIVES: To investigate if the use of paracetamol as an oral nonprescription mild analgesic was...

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Østergaard CS, Ernst A, Gaml-Sørensen A, et al. Use of paracetamol (acetaminophen) as a nonprescription analgesic and semen quality in young men: A cross-sectional study. Andrology. 2021;doi: 10.1111/andr.13129.
Østergaard, C. S., Ernst, A., Gaml-Sørensen, A., Brix, N., Toft, G., Haervig, K. K., Hougaard, K. S., Bonde, J. P., Tøttenborg, S. S., & Ramlau-Hansen, C. H. (2021). Use of paracetamol (acetaminophen) as a nonprescription analgesic and semen quality in young men: A cross-sectional study. Andrology, . https://doi.org/10.1111/andr.13129
Østergaard, Cecilie Schmidt, et al. "Use of paracetamol (acetaminophen) as a nonprescription analgesic and semen quality in young men: A cross-sectional study." Andrology vol. (2021). doi: https://doi.org/10.1111/andr.13129
Østergaard CS, Ernst A, Gaml-Sørensen A, Brix N, Toft G, Haervig KK, Hougaard KS, Bonde JP, Tøttenborg SS, Ramlau-Hansen CH. Use of paracetamol (acetaminophen) as a nonprescription analgesic and semen quality in young men: A cross-sectional study. Andrology. 2021 Nov 15; doi: 10.1111/andr.13129. Epub 2021 Nov 15. PMID: 34779581.
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